Ok i dont even have my Z-400 yet but im still picking out mods. I have been looking at some exhausts and cant decide which one is better suited for me.Im judging on good sound, a good deep sound, low-mid end power, i need to get up front end easily but need the mid power for hills etc... I was thinking of the white bros e series and the por circuit Ti-4. What exhausts do u think are best?

 

I got 2 full Hmf systems for both my Z's and love them. Sound is awsome, Front end is very light,makes great power gains from bottom to top on the rpm range,easy to wheelie in 1rst and second,third takes just a little help,and if do it just right you can stand it up in fourth until you run out of room. If you only want low to mid gains just get the slip-on kit thats alot cheaper. Ithink the headpipe only gives you an extra 2hp at top end so if that doesn't matter you can knock off about $150, I paid under $400 each for mine,they came with UNI filter,jetting,headpipe,muffler,hardware,and instructions shipped to my door! There is a website that has a "z400 pipe shootout" to backup my claims. You may be able to find it using those key words. However HMF did not take the overall prize because it was SO LOUD! Hope this is helpful,This is my first reply, thought this might help you.

 

If have the white brothers E-series full system on my z and i love it. Sounds great and is easily tuneable with the external plates. Gives good power and is one of the highest on the dyno. light front end also just like kawzukicatguy. I also like the HMF though i herd its good.

 

Nevermind, i decided to go with a vinson afterall. I like the power of a 4X4.....thx after all